– Lat/Long: 48.71° N 121.99° W
South Twin Sister
Weather Forecast, United StatesIssued: 4 pm Sat 29 Aug Local TimeUpdates in: hr min sUpdate imminent
Issued: 4 pm Sat 29 Aug Local Time
Updates in:
Update imminent hr min s
Issued: 4 pm Sat 29 Aug Local Time
Updates in:
Update imminent hr min s
3 South Twin Sister Elevations: 3 Forecast Elevations: Days 1–4 Weather SummaryMostly dry. Warm (max 22°C on Mon afternoon, min 10°C on Sat night). Wind will be generally light. | Days 5–7 Weather SummaryHeavy rain (total 22mm), heaviest during Thu morning. Warm (max 21°C on Tue afternoon, min 11°C on Wed night). Wind will be generally light. | ||||||||||||||||
Sat 29 | Sunday 30 | Monday 31 | Tuesday 1 | Wednesday 2 | Thursday 3 | ||||||||||||
PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | AM | PM | night | |
 |  |  |  | | | |  |  | |  | | |  |  | |  | |
rain shwrs | some clouds | light rain | some clouds | some clouds | some clouds | some clouds | clear | clear | some clouds | cloudy | light rain | light rain | mod. rain | mod. rain | rain shwrs | rain shwrs | |
Cloud base (m) | 1950 | 2200 | 1750 | 1800 | 6450 | 5550 | 4150 | 8400 | 4650 | 2100 | 1500 | 700 | 550 | 600 | 800 | 6650 | |
km/h | |||||||||||||||||
 |  |  |  |  |  | ||||||||||||
 cm | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — | — |
mm | 0.5 | — | 0.1 | — | — | — | — | — | — | — | — | 0.6 | 1.6 | 9 | 7 | 3 | 0.3 |
max °C | 15 | 12 | 12 | 15 | 13 | 18 | 22 | 18 | 19 | 21 | 16 | 13 | 15 | 12 | 11 | 14 | 12 |
min °C | 14 | 10 | 11 | 15 | 12 | 14 | 22 | 15 | 16 | 20 | 13 | 13 | 13 | 11 | 11 | 13 | 11 |
chill °C | 14 | 10 | 11 | 15 | 12 | 14 | 22 | 15 | 16 | 20 | 12 | 12 | 12 | 11 | 11 | 13 | 11 |
Freezing level m | 2500 | 2600 | 3050 | 3150 | 3450 | 3550 | 3750 | 3600 | 3650 | 3450 | 3000 | 2650 | 2650 | 2450 | 2200 | 2400 | 2700 |
 | — | — | 6:20 | — | — | 6:22 | — | — | 6:24 | — | — | 6:24 | — | — | 6:26 | — | — |
 | 7:55 | — | — | 7:53 | — | — | 7:52 | — | — | 7:50 | — | — | 7:47 | — | — | 7:45 | — |
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South Twin Sister Weather (Days 0-3):
The weather forecast for South Twin Sister is: Mostly dry. Warm (max 22°C on Mon afternoon, min 10°C on Sat night). Wind will be generally light.
South Twin Sister Weather (Days 3-6):
Heavy rain (total 22mm), heaviest during Thu morning. Warm (max 21°C on Tue afternoon, min 11°C on Wed night). Wind will be generally light.
This table gives the weather forecast for South Twin Sister at the specific elevation of 500 m. Our advanced weather models allow us to provide distinct weather forecasts for several elevations of South Twin Sister. To see the weather forecasts for the other elevations, use the tab navigation above the table. For a wider overview of the weather, consult the Weather Map of Washington.
| Weather Station | Temp. | Weather | Wind | Gusts | Cloud / Visibility |
|---|---|---|---|---|---|
 | |||||
Bellingham Airport | | ||||
SHIP8350 | |||||
* NOTE: not all weather observatories update at the same frequency which is the reason why some locations may show data from stations that are further away than known closer ones.